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Achasov, M. N.; Amoroso, A.; Bortone, A.; Calcaterra, A.; Chang, J. F.; Chen, C.; Chen, M. L.; Chen, Y. B.; Cui, J. J.; Dai, J. P.; Destefanis, M.; Dong, X.; Fan, Y. L.; Farinelli, R.; Felici, G.; Fritsch, M.; Fritzsch, C.; Garbolino, S.; Gong, L.; Gu, L. M.; Guskov, A.; Heinsius, F. H.; Janchiv, S.; Ji, Q.; Ji, Y. Y.; Jia, Z. K.; Kang, X. S.; Kappert, R.; Khoukaz, A.; Kuessner, M.; Kühn, W.; Lavania, A.; Li, H. J.; Li, Xiaoyu; Liang, Y. F.; Liao, L. Z.; Liu, D.; Liu, F. H.; Liu, Ke; Liu, Y.; Lyu, X. R.; Ma, F. C.; Ma, M. M.; Mangoni, A.; Mo, X. H.; Muchnoi, N. Yu; Nerling, F.; Nikolaev, I. B.; Olsen, S. L.; Pacetti, S.; Pan, X.; Qi, M.; Qian, S.; Qin, Z. H.; Redmer, C. F.; Rolo, M.; Schelhaas, Y.; Schnier, C.; Schoenning, K.; Shao, L. G.; Shen, X. Y.; Shi, J. Y.; Shi, X. D.; Song, J. J.; Sun, G. X.; Sun, X.; Tao, Q. T.; Wang, B.; Wang, F.; Wang, H. P.; Wang, Z. Y.; Wei, D. H.; Wen, S. P.; Wu, X.; Xiao, H.; Xie, C.; Xie, X. H.; Xu, C. F.; Xu, S. Y.; Xu, Y. C.; Xu, Z. P.; Yan, W. B.; Yang, H. J.; Yin, J. H.; Yu, G.; Yu, T.; Yuan, C. Z.; Zhang, B. X.; Zhang, Lei; Zhang, Shulei; Zhang, X. D.; Zhao, M. G.; Zhao, Q.; Zhemchugov, A.; Zhong, B.; Zhong, X.; Zhou, X.; Zhou, X. R.; Zhu, J.; Zhu, K. J.
Physical review. D, 09/2022, Letnik: 106, Številka: 5Journal Article
Using data samples collected with the BESIII detector operating at the BEPCII storage ring, we measure the cross sections of the e + e − → π + π − D + D − process at center-of-mass energies from 4.190 to 4.946 GeV with a partial reconstruction method. Resonance structures are seen and the cross section line shape can be described by the coherent sum of either two Breit-Wigner functions or a Breit-Wigner function and a phase space term. The mass and width of the resonance at about 4.4 GeV are determined to be (4371.6±2.5±9.2) MeV/c 2 and (167±4±29) MeV, respectively, which are in agreement with those of the ψ(4360) or Y(4390) state. The spin-3D-wave charmonium state X(3842) is searched for through the e + e − → π + π − X(3842) → π + π − D + D − process, and evidence with a significance of 4.2σ is found in the data samples with center-of-mass energies from 4.6 to 4.7 GeV.
